Medium severity · published Oct 27, 2026
CVE-2026-116829
llama.cpp b10398 before b11301 Integer Overflow in gguf_init_from_reader
New
6.6
CVSS
0.1%
EPSS
No
On KEV
Description
llama.cpp b10398 before b11301 contains an integer overflow vulnerability in gguf_init_from_reader that allows attackers to bypass tensor element-count validation by supplying shapes whose product wraps to zero. Attackers can craft GGUF files with enormous tensor extents that overflow ggml_nbytes() and strides, causing out-of-bounds memory access when buffers are sized from wrapped byte counts.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LL
llama.cpp · ggml-org
b10398 before b11301; 0.1.0 before 0.6.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116829
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116829
github.com
https://github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L701
github.com
https://github.com/ggml-org/llama.cpp/commit/2149c00f4442dc59302e134a02e4c99d5f7ed9fc
github.com
https://github.com/ggml-org/llama.cpp/issues/29383
github.com
https://github.com/ggml-org/llama.cpp/pull/29384
github.com
https://github.com/ggml-org/llama.cpp/releases/tag/b11301
www.vulncheck.com
https://www.vulncheck.com/advisories/llama-cpp-b10398-before-b11301-integer-overflow-in-gguf-init-from-reader
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